Pressure can



Sept. 1, 1931. H. J. H. NATHORST PRESSURE CAN Filed Feb. 27, 1929Hl/orney.

Patented Sept. 1, 1931 ATE into their cylinders or into passagewaysnAnnY JOI-IA'N HJALMAR narnonsrfon smooxnonrr, swnnEN, ASSIGNOR TOAKTIE- Bernese nonnrsnng'smmrnnrennixnmm, or s'rocKHoLM, SWEDEN, A com-E341w neeement]; In: swnnr'n PRESSURE CAN Application filed February 27,1929, Serial No. 343,001, and in Sweden February 28, 1928. d

Of late it has become increasingly usual to 'lubricate pneumatic tools,rockxdrills, coal pick hammers, and so forth, by introducing bordering.the same,-certain kinds of ,so-

I called thick or consistent grease, that is to say,-more or lessviscous lubricants. Hitherto there has been a want, however, of a handyand easily transportable grease can or lubricator for this purpose. Inorder that such a grease can shall-be fully suited .to its purpose, itshould be such, at least whenfinadein small sizes, that it can becarried in the pocket, and for this reason, i-nter'alia, it should be soconstructed that no grease will bepressed out of the can when it is notiised, even if the can is inadvertently sub ected to pressure.Furthermore, the spout of the can should be, arranged 111 such mannerthat, it is protected against damage as far as possible, when the can snot used;

".Now, the present inventionrelates to a pressure can which fullyanswers theserequirements, and which-is capable of being used not onlyfor-lubricating the above mentioned and otherniachines with lubricating,vgrease, but which may also be used with advantage for portioning outother plastic pastes or bodies.- The improved pressure can or grease guncomprises a can for receiving lubrieant orpaste', and a-slidable bottomin said can, and is'principally characterized by that the spout isslidalrly mounted in said can as well as llluSRlCl'bOfillOlll in such.nianner that the spout may'be pulled out .to project beyond the canandmaybevpushed into the can, said spout bein provided with at least oneopeningjwlthin said can "located in {such manner that: inthegpulledout.position of the spout said opening affords-commi'inicationbetween theinterior of the can and the spout,wh1le1n the pushed-1n position of thespoutsaid opening is covered by thebottom so that thesinterior of thecan is shut off from communication with the spout.

u 1 This arrangement; suitably carried out :in such mannerthat the spoutis 'sli dably mounted in the cap of the can,f,and isprovided within thecan with oneor more side openings, while the slidable bottom is providedwith an opening in which thespout lits tightly, so that the bottom maybe pushed in over the spout for the purpose of pressing out the greaseor paste. a

An embodiment of the invention is illustrated in the accompanyingdrawings, by way of example. Fig. l is a longitudinal section through apressure can or grease gun according to the invention, and Fig. 2is aside view of the same. o The grease or paste to be portioned out is keptin the-space 1 which, is enclosed by the cylindricalcan shell 2, bottom3, cap 4, and

one or more longitudinal slots which are engaged by screws 11screw-threaded through the can shell 2, so that saidscrews and slotslimit the sliding motion of the bottom Sin the can. Secured tothe spout,5, which'is provided with abottom 12, are a guide ring 13 and a stopringl t ofequal diameters, the former of which serves to ,guide thespout in the tube 9, while the ring 14 serves as a stop for the spoutwhen pulled out through the cap, 4.,

5 The cap 4, which may suitably be provided with a 'nurled "edge, isshown as adapted to be attached to the can 2 by means of a bayonet lock,consisting; of pins 15 secured tothe can wall and which engage? angularslots'16 in the can The cap can thus easily be takenofl? and puton. Thespout 5 1'5 sl'rdable inn central openlng 1n :the cap 4. so that itv maybe pulled out and pushed in, its outward movement being limited by thestop ring 14 as above ex- ,plained, and its inward movementvbeing.limit-edby its nozzle 17;} ,A packing, ring 18 of feltis providedlinthe cap .andserves to prevent the grease from passing, out

Gil

sure or vacuum arising in the tube 9 when the spout is displaced.

pushing the bottom 3 so far down as slots 10 andscrews ill will admit,The sleeve is now turned relatively to the can The" grease ean 'is madereadyfi'or use by takingofi the Cap 4 with the spout 5, and by the 2; sothat the screws II engage the upper lateral portions of the slots 10,and thus prevent the can 2 from moving downwards by its own weight, whenthe can is placed on the bottom 8.- As wooden pin, iron rod, or thelike, is now inserted in the tube9 in order to prev nt a lubricant frompassing down into said tube. The space 1. is now filled with greasewhich'isquiteeasily done, sincesaid spacehas a comparatively small depthin proportion to its width.

When the space" It has been filled, theabove mentioned in or the hke'isremoved, the spout- 5- is' carefully pushed into the tube 9, and the cap4 is put on" andsecu-red by the aid of the above mentioned bayonet lock.

Finally, the sleeve 7 is turned back so far that it can freely bemovedinthe axial direction thecan When the grease can' is afterwardsto'be used the spout- 5 is pulled outso far that the stop ring 14 comesto bear against the side of the-tap 4, after which pressure is a pIi'edto the bottom 8. The rease is thereby pressed from the space '1 throu hthe opening 6 into the spout 5 and out though said spout and the nozzle17 to the grease hole of-the machine or apparatus in question. When the"can is no more to be used, the spout 5') is again pushed in as far asthe nozzle 17'wi1l admit. The spout new projects so little outside thecaptlia't it is protected against damage as far as possible, and theopenings 6' are closed by the wall of thetdbee', so thatno grease can bepressed. out of "the can when the spout is pushed into the same; V

- It will thus be evident that the can is very easily filled as we-11'as convenient to handie,

owing to thespoiut being adapted to be pushed in, and'when pushed in,also closing the The can may thus easily be transported without risk ofany" portion of its eontents flowing out if theme is inadiii a ocketwithout risk.

vertently' upset, or'if the bottom 8' is inadvettentlysubjeetedtopressure When made in'a suitable sizethe can can thus be carried Incertain cases, when lubricating grease be other pastes are concerned,the same may be so viscous that more force is re uired in I order-topress outthe same than what can leonv nientiybe produced by pre sureapplied directly tothebot'tom 81; Insuc'h cases Ithemn walla may bprovided, f r instance,

with interior threads, and the sleeve 7 with exterior threads, and thebottom 3 may be forced inwards as required simply by turn viding the can2 and sleeve 7 with screw- 7 threads, a strap maybe rigidly or pivotallyattached tothe' can 2", such strap extending outside the bottom 8, and ascrewo'rrotatable eccentric disk may be provided in the same by means ofwhich the sleeve 7 and [bottom 3 may be forced inwards into the can. I b

In the embodiment'illustrated the can is supposed to have a" circularcross section, but it will be understood that it may also be made anoval or edged cross section.

- I claim: Y

1. In a pressure can, the combination of a can for receiving lubricantor other paste, a bottom slidable said can, and a substantia'lly tubularspout slid'ably mounted in said can as well as in said bottom in suchmanner that said spout may be pulled out to proj ect-beyond'said can andmay be pushed intothe can, said spout being provided with at least oneopening within said can located in such manner that in the pulledoutposition of said. spout said opening aiiord-"s communication between theinterior of 'said can and said spout while in the pushed-in position ofsaid spout said opening is covered by said bottom so that the interiorof said can is shut off: from communication with said spout.

2. In a pressure can, the combination of a can for receiving lubricantor other paste, a bottom slidable said can, a substantially tubularspout slidably mounted said can as well as in said b'Ott'Om in suc'h.-manner that said spout may be pulled out tobprop'osition'of said spoutsaid opening-affords communication betweenthe interior of said can andsaid spout while in'the pushed-in position of said spout said opening iscovered bysaid bottom so that the interior of said can is shut on fromcommunication wit'h'said' spout,--and a stop ring attached.

to said spout and adapted to limit the outv ward displacement of saidspout relatively" to said can, said spout having such length that insuch position it still retains engagement with said bottom.

In a pressure can, the combination of a can for receiving lubricant orother paste,

abottom sl'idable in said can, a substantially tubular spout slidablymounted in said can as well as in said bottom in such manner that saidspout may be pulled out to project beyondisaid'can and maybe pushed intothe can, said spout bein'gprovided with at least one opening Within saidcan located in such manner that in the pulled-out position of said spoutsaid opening affords communication between the interior of said can andsaid spout While in the pushed-in position of said spout said opening iscovered by said bottom so that the interior of said can is vided with aleast one opening Within said can located in such manner that in thepulled-outposition of said spout said opening affords communicationbetween the interior of said can and said spout While in the pushed-inposition of said spout said opening is covered by said bottom so thatthe interior of said can is shut off from communication With said spout,a sleeve attached to said slidable bottom, said sleeve having at leastone longitudinal slot, and at least one screw screw-threaded throughsaid can and engaging such slot.

HARRY JOHAN HJALMAR NATI'IORST.

